Improvement in burglar-proof safes



sind utilities.

GEORGE W. PTNAM, 0F BGSTON, MASSACHUSETTS.

Letters Patent No. 97,810, dated December 14, 1869; I antedated November27, 1869.

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` IMPROVEMENT IN BU'GLAR-PROOF SAPES.

The `Schedule referred to in these Lettera Patent and making part cf thesame.

Y To all persons to whom' these presents may come: l

, Be it known that LGEORGE W. PUTNAM, of Boston, in the county of Snolk,and State of Massachu setts, have invented, anew and useful Improvementor Manufacture of Burglar-Proof Safe; and do hereby declare the same tobe fully described in the following specification, and represented inthe accompanying drawing, which denotes a vertical section of `my iufvention, as arranged with a common safe made of iron,

or other proper material.

`My invention above named consists- .l First, of a hollow cylinder, A,made of iron, steel, or other suitable material, and having a malelscrewthread, a, cuton its outer surface. This hollow cylinder A is to besecurely fastened to the floor b ot' a common safe, S; or ifused'in ahorizontal position, it

. `may be fastened to the side of the safe.

v Second, of anotherhollow andfdomecovered cylinder, B,V provided ouitsinside with afemale screw, o, to match the thread a on the outside ofthe' cylinder A,\above described.

' l The forms of the two parts B are as represented.

The money, papers, Sac., are placed in the hollow cylinder A, andthecylinder B is put on over the cylinder A, and turned or screwed downthereon. l

When the cylinder .B is turned fully down, one or more bolts, C,attached `to said cylinder B; are to be pushed into holes or recesses,D, made within the in-` side cylinder A, such being so as to prevent thecylinder B from being unscrewed or movedy back, and those bolts arelocked in their place `by` any suitable lock applied to the case B, orby the machinery of any of the co1nbination, or other suitable locks,which are usually used on the doors of safes.

Or a bolt or bolts may be arrranged ou the inside of the inside cylinderA, so asto push into a recess in o the inside of the top of the outsidecylinder" B, and l these bolts thus arranged may be operatedby a spindiepushed in through au orifice made in the outside `and inside cylinders Aand B, and said spindle may be withdrawn after turning the bolts intotheir places. The orifice for the spindle can then be securely closedsuitably' applied;

Either ofthe above arrangements for bolting and securely fastening thecylinders A and B together will eiiect the end desired.

by the operation of a combination or other lock,-

- The top of the cylinder B is to be round` or domeshaped. Y

"When the combination or other lock is operated or bolted as abovedescribed, the bolt or bolts `which are employed to' fasten thecylindersAv and B, so as to prevent-B` from being `revolved on A, cannot bewithdrawn.

impregnable.V The most patent tool of the burglar is the wedge.

With this implement he, with comparative ease, can

generally open the strongest doors, `or break the corners of safes, asusually made.

My burglar-proof, as above described, has no door, and being cylindricaland dome-shaped, it has no corners to be broken.

Having no door, in the usual meaning of the word, and no corners, theburglar can nd no place in which to enter a wedge, and even if he could,the immense resisting power of the screw and the bolts, combined asabove, would electually baffle all his attempts to enter. Y

When access to the contents of the screw-safe may be desired, thesafevis first to be unlocked. The bolts to a crane or other suitableapparatus, and swung aside or hoisted out of the way; or the outsidecylinder B may be turned nearly off, so as to uncoveran opening made inand through the side of the cylinder A. Through this opening thecontents of the inside of the safe may be reached.

If desirable, in order to give additional security and strength, thelower edge ofthe cylinder B may bearranged to enter a groove in thefloor of the common safe and screw into the same;

The safes above described may have Franklinite, hardened steel,Spigeleisen chilled iron, chrome iron, or any other substance orcomposition, placed in any -part thereof to render them secure andimpregnable

